casovscrassoWhat's the difference?

Quick tell: caso is a conjunction, crasso is an adjective, so they fill different roles in a sentence.

Which to use

“caso” is a conjunction and “crasso” is an adjective - they look or sound alike but fill different roles in a sentence.

#181
“caso” frequency rank
#39,078
“crasso” frequency rank
39259
confusion score

Side-by-Side Comparison

Feature caso crasso
Definition na hipótese de; se espesso

Where the eye mixes caso and crasso

Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. caso runs 4 letters (CVCV) against crasso's 6 (CCVCCV) - the length gap alone is often enough to separate them once you know to check it.

4 ch
caso
6 ch
crasso

Look-alike desk: caso vs crasso

These two trip readers on the page rather than in the ear: caso is /ˈka.zu/ while crasso is /ˈkɾa.su/. Spoken aloud the problem disappears. In writing it persists, because they differ by 2 letter(s) in length, and the parts of speech differ too (conjunction vs adjective), which is usually the fastest check. Our composite confusion score for this pair is 39259, derived from the frequency rank of both members and their visual similarity.

caso is recorded at frequency rank #181, classified as aconj, pronounced /ˈka.zu/. crasso is at rank #39,078, tagged as anadj, pronounced /ˈkɾa.su/.

Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.

With a confusion score of 39259, this pair ranks #27,043 of 75,631 scored Portuguese confusable pairs - roughly mid-pack for confusability.

Orthographic DNA of caso vs crasso

Shared letters: acos. Private to "caso": -. Private to "crasso": r.

"caso" · 4 letters · shape CVCV  ·  "crasso" · 6 letters · shape CCVCCV

Known mistypes of this pair

  • caso ← acso · casso · ccaso · csao
  • crasso ← carsso · ccrasso · craso · crasos · crrasso · crsaso · rcasso

Frequently Asked Questions

Is swapping "caso" for "crasso" ever safe?
No - they are not even the same part of speech. "caso" is a conjunction and "crasso" an adjective, so a sentence built for one is usually ungrammatical with the other.
Frequency check: "caso" vs "crasso" - which ranks higher?
"caso" is the more common of the two: it sits at frequency rank #181 in our Portuguese list, against #39,078 for "crasso". That is a wide gap, so in ordinary text the rarer spelling is the one worth double-checking.

What to do next

Eye-level mix-up between "caso" and "crasso" is sorted above. Next: full entries or other pairs that share a letter shape.

  • Full dictionary entry for "caso" with definition, IPA, and generated misspellings. Word entry
  • Full dictionary entry for "crasso" - compare definitions side by side with the headword page. Word entry
  • This pair ranks #27,043 of 75,631 scored Portuguese confusable pairs in this corpus vintage. Corpus statistics
  • "caso" and "crasso" also get mixed up with nearby pairs, the highest-scored neighbour is "chassi vs crasso". Nearby pair
  • Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes

Confusion rank #27,043 of 75,631 scored Portuguese pairs, corpus vintage 2026-09-03, not spelling advice.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list